docs: def get_pubmed_citation_response(pubmed_identifiers: Iterable[str]):
      """Get the response from PubMed E-Utils for a given list of PubMed identifiers.
  
      :param pubmed_identifiers:
      :rtype: dict
      """
      pubmed_identifiers = list(pubmed_identifiers)
      url = EUTILS_URL_FMT.format(','.join(
          pubmed_identifier
          for pubmed_identifier in pubmed_identifiers
          if pubmed_identifier
      ))
      response = requests.get(url)
      return response.json()